linux-kernel - Re: [PATCH 3/4] arm64: Kconfig: Fix VEXPRESS driver dependencies

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Message-ID: <CAK8P3a3u8KhgaqoK0=2CXBs0HMh0fuN-ANvvQtSrWQm0J6xnvw@mail.gmail.com>
Date:   Thu, 12 Sep 2019 11:17:14 +0200
From:   Arnd Bergmann <arnd@...db.de>
To:     Amit Kucheria <amit.kucheria@...aro.org>
Cc:     "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Linux ARM <linux-arm-kernel@...ts.infradead.org>,
        arm-soc <arm@...nel.org>,
        Bartosz Golaszewski <bgolaszewski@...libre.com>,
        Catalin Marinas <catalin.marinas@....com>,
        Kishon Vijay Abraham I <kishon@...com>,
        Liam Girdwood <lgirdwood@...il.com>,
        Linus Walleij <linus.walleij@...aro.org>,
        Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
        Mark Brown <broonie@...nel.org>,
        Michael Turquette <mturquette@...libre.com>,
        Sebastian Reichel <sre@...nel.org>,
        Stephen Boyd <sboyd@...nel.org>, Will Deacon <will@...nel.org>,
        linux-clk <linux-clk@...r.kernel.org>
Subject: Re: [PATCH 3/4] arm64: Kconfig: Fix VEXPRESS driver dependencies

On Thu, Sep 12, 2019 at 12:19 AM Amit Kucheria <amit.kucheria@...aro.org> wrote:
>
> Push various VEXPRESS drivers behind ARCH_VEXPRESS dependency so that it
> doesn't get enabled by default on other platforms.
>
> Signed-off-by: Amit Kucheria <amit.kucheria@...aro.org>
> ---
>  drivers/bus/Kconfig           | 2 +-
>  drivers/clk/versatile/Kconfig | 4 ++--
>  2 files changed, 3 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/bus/Kconfig b/drivers/bus/Kconfig
> index d80e8d70bf10..b2b1beee9953 100644
> --- a/drivers/bus/Kconfig
> +++ b/drivers/bus/Kconfig
> @@ -166,7 +166,7 @@ config UNIPHIER_SYSTEM_BUS
>
>  config VEXPRESS_CONFIG
>         bool "Versatile Express configuration bus"
> -       default y if ARCH_VEXPRESS
> +       depends on ARCH_VEXPRESS
>         depends on ARM || ARM64
>         depends on OF

Removing the 'default y' breaks existing defconfig files,

Adding the 'depends on ARCH_VEXPRESS' unnecessarily limits
compile-testing. I'd rather extend it to other architectures than
limit it to builds that have vexpress enabled.

> diff --git a/drivers/clk/versatile/Kconfig b/drivers/clk/versatile/Kconfig
> index ac766855ba16..826750292c1e 100644
> --- a/drivers/clk/versatile/Kconfig
> +++ b/drivers/clk/versatile/Kconfig
> @@ -5,8 +5,8 @@ config ICST
>  config COMMON_CLK_VERSATILE
>         bool "Clock driver for ARM Reference designs"
>         depends on ARCH_INTEGRATOR || ARCH_REALVIEW || \
> -               ARCH_VERSATILE || ARCH_VEXPRESS || ARM64 || \
> -               COMPILE_TEST
> +               ARCH_VERSATILE || ARCH_VEXPRESS || COMPILE_TEST
> +       depends on ARM64

It's definitely wrong to limit this to 64 bit.

      Arnd